Control method and device for preventing interference electricity of low-voltage circuit breaker

Abstract

The invention discloses an anti-interference electricity control method and device for a low-voltage circuit breaker, and relates to the field of circuit breaker control, and the key points of the technical scheme are as follows: obtaining an equipment voltage tolerance curve of load equipment connected with the low-voltage circuit breaker; randomly generating multiple groups of sag characteristic indexes of the equipment voltage tolerance curve; and randomly selecting the multiple groups of sag characteristic indexes by adopting a particle swarm algorithm, and inputting the selection results of the multiple groups of sag characteristic indexes and the voltage sag amplitude and phase of the low-voltage release at the current moment into a function mapping relation until the maximum duration of non-action reaches the maximum value and the minimum duration of action reaches the minimum value. Outputting working condition parameters when a release of the low-voltage circuit breaker acts; and when it is detected that the current operation condition of the release reaches the working condition parameter, the amplitude and phase of the power grid voltage and the amplitude and phase of the equipment load voltage are detected, and when the difference between the amplitude and phase meets a preset action condition, the release is controlled to act.

Description

Technical Field

[0001] The present invention relates to the field of circuit breaker control, and more particularly to a control method and device for preventing power swing of a low-voltage circuit breaker. Background Art

[0002] When the power grid encounters severe weather, external damage, faults, etc., it will produce short-term voltage fluctuations or short-term interruptions, commonly known as "power shaking". Even if the system is designed for the highest reliability, power shaking is inevitable and difficult to predict.

[0003] For sensitive users, more than 90% of power quality problems are caused by power fluctuations. Therefore, power fluctuations have been considered as one of the main power quality problems that affect the normal and safe operation of such electrical equipment.

[0004] Low-voltage releases are currently widely used in distribution networks because of their undervoltage and loss of voltage protection functions. Voltage sag has become the most concerned power quality issue for power supply departments and power users. When a voltage sag occurs, within the ability of the user-side equipment to withstand voltage sags, the reasonable and scientific configuration of the low-voltage release can avoid false tripping, effectively reduce the average power outage time of users, and greatly ensure the reliability of power supply. Its function is that when the voltage drops to a certain level, the release will trip the low-voltage circuit breaker, which plays a protective role in the safety of electrical equipment and personnel. For the power grid, the use of low-voltage releases can prevent a large number of loads from starting at the same time when the power grid resumes power supply, causing the bus voltage to be too low, affecting the normal operation of electrical equipment; for users, it can prevent overcurrent damage caused by low-voltage operation, as well as accidents such as electric shock caused by inspection and restoration.

[0005] At present, the release is prone to malfunction during power fluctuations, causing the circuit breaker to trip, thereby causing the power fluctuation to evolve into a power outage, affecting the normal operation of electrical equipment and causing unnecessary power outages. Summary of the invention

[0006] The object of the present invention is to provide a control method and device for preventing power shaking of a low voltage circuit breaker, so as to solve the power outage accident caused by the malfunction of the release during power shaking.

[0007] In a first aspect of the present application, a control method for preventing power swing of a low voltage circuit breaker is provided, the method comprising:

[0008] Obtaining equipment voltage withstand curve of load equipment connected to the low voltage circuit breaker;

[0009] Randomly generate multiple sets of sag characteristic indicators of equipment voltage tolerance curve;

[0010] A particle swarm algorithm is used to randomly select multiple groups of sag characteristic indicators, and the selection results of the multiple groups of sag characteristic indicators and the voltage sag amplitude and phase of the low-voltage release at the current moment are input into a function mapping relationship until the maximum duration of no action and the minimum duration of action are reached, and the operating condition parameters of the release of the low-voltage circuit breaker when the release is in action are output; wherein the function mapping relationship is used to describe the correlation between the voltage sag characteristics of the release and the historical operating condition parameters;

[0011] When it is detected that the current operating conditions of the releaser reach the operating parameters, the amplitude and phase of the grid voltage and the equipment load voltage are detected. When the difference between the amplitude and phase meets the preset action conditions, the releaser is controlled to act.

[0012] In one implementation, the historical operating condition parameters include load capacity, voltage sag mode, voltage sag amplitude, phase, sag duration and sag interval.

[0013] In one implementation, the function mapping relationship is determined as follows:

[0014] Obtain historical operating parameters when a voltage sag occurs in the power grid where the low-voltage circuit breaker is located;

[0015] A bidirectional long short-term memory neural network is used to construct the functional mapping relationship between the voltage sag characteristics of the release of the low voltage circuit breaker and the historical operating parameters.

[0016] In one implementation, an instantaneous reactive power algorithm is used to detect the amplitude and phase of the grid voltage and the device load voltage.

[0017] In one implementation, when the difference between the amplitude and the phase meets the preset action condition, the release is controlled to act, specifically:

[0018] The amplitude difference and phase angle difference between the grid voltage and the equipment load voltage are calculated. If the amplitude difference is less than the preset amplitude, it is determined whether the phase angle difference is less than the preset phase angle value. If it is less than the preset phase angle value, the release is controlled to operate.

[0019] In a second aspect of the present application, a control device for preventing power swing of a low-voltage circuit breaker is provided, the device comprising:

[0020] An acquisition module, used for acquiring a device voltage tolerance curve of a load device connected to a low voltage circuit breaker;

[0021] An index generation module, used to randomly generate multiple groups of sag characteristic indexes of the equipment voltage tolerance curve;

[0022] The working condition parameter determination module is used to randomly select multiple groups of sag characteristic indicators by using a particle swarm algorithm, input the selection results of the multiple groups of sag characteristic indicators and the voltage sag amplitude and phase of the low-voltage release at the current moment into the function mapping relationship until the maximum duration of no action and the minimum duration of action, and output the working condition parameters of the release of the low-voltage circuit breaker when the release is in action; wherein the function mapping relationship is used to describe the correlation between the voltage sag characteristics of the release and the historical working condition parameters;

[0023] The action control module is used to detect the amplitude and phase of the grid voltage and the equipment load voltage when it is detected that the current operating conditions of the release meet the operating parameters, and control the release to act when the difference between the amplitude and phase meets the preset action conditions.

[0024] In one implementation, the historical operating condition parameters include load capacity, voltage sag mode, voltage sag amplitude, phase, sag duration and sag interval.

[0025] In one implementation, the operating condition parameter determination module is specifically used to:

[0026] Obtain historical operating parameters when a voltage sag occurs in the power grid where the low-voltage circuit breaker is located;

[0027] A bidirectional long short-term memory neural network is used to construct the functional mapping relationship between the voltage sag characteristics of the release of the low voltage circuit breaker and the historical operating parameters.

[0028] In one implementation, the action control module is further used to: use an instantaneous reactive power algorithm to detect the amplitude and phase of the grid voltage and the equipment load voltage.

[0029] In one implementation, the action control module is specifically used to: calculate the amplitude difference and phase angle difference between the grid voltage and the equipment load voltage; if the amplitude difference is less than the preset amplitude, determine whether the phase angle difference is less than the preset phase angle value; if it is less than the preset phase angle value, control the release to operate.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] In a control method and device for preventing power sway of a low-voltage circuit breaker provided in an embodiment of the present application, a solution method capable of adapting to changes in equipment tolerance characteristics is constructed by introducing multiple groups of temporary sag characteristic indicators of a device voltage tolerance curve of a load device, that is, a particle swarm algorithm is used to randomly select multiple groups of randomly generated temporary sag characteristic indicators to obtain selection results of multiple groups of control parameters, and the random selection results and the voltage sag amplitude and phase of the low-voltage release at the current moment are input into a function mapping relationship. When the maximum duration of non-action obtained reaches a maximum value and the minimum duration of action reaches a minimum value, the tripping state of the low-voltage circuit breaker can be output. The working condition parameters when the tripper is in action, based on the working condition parameters, can ensure that the low-voltage tripper can always maintain good voltage tolerance performance when the equipment tolerance characteristics change, and improve the breaking capacity of the low-voltage tripper, that is, the working condition parameters of the tripper of the low-voltage circuit breaker when the tripper is in action are determined by the temporary sag characteristics of the load equipment, such as capacity, amplitude, duration, etc., so that when these working condition parameters are detected in the operating conditions of the power grid, it means that the power grid has a bad operation. At this time, the amplitude and phase of the power grid voltage and the equipment load voltage are detected again, and when the difference between the amplitude and phase meets the preset action conditions, the tripper is controlled to act. Therefore, the present invention is based on the voltage sag tolerance capacity of the load equipment, and takes into account the voltage sag characteristics of the low-voltage tripper. When a voltage sag event occurs, within the voltage sag tolerance capacity of the load equipment, the low-voltage tripper can effectively avoid false tripping, thereby ensuring the reliability of power supply on the user side. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0033] Figure 1 A flow chart of a method for controlling power sway prevention of a low-voltage circuit breaker provided in an embodiment of the present application;

[0034] Figure 2 A principle block diagram of a low-voltage circuit breaker anti-electrical shaking control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0036] It should be noted that the terms "include" or "may include" used in various embodiments of the present application indicate the presence of the function, operation or element applied for, and do not limit the addition of one or more functions, operations or elements. In addition, as used in various embodiments of the present application, the terms "include", "have" and their cognates are only intended to indicate specific features, numbers, steps, operations, elements, components or a combination of the foregoing items, and should not be understood as first excluding the presence of one or more other features, numbers, steps, operations, elements, components or a combination of the foregoing items or the possibility of adding one or more features, numbers, steps, operations, elements, components or a combination of the foregoing items.

[0037] Please refer to Figure 1 , Figure 1 A flow chart of a method for controlling a low voltage circuit breaker to prevent power swing provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the method includes:

[0038] S101, obtaining a device voltage tolerance curve of a load device connected to a low voltage circuit breaker.

[0039] In this embodiment, the voltage sag sensitivity of the device refers to the sensitivity of the device to voltage sag, that is, the characteristic of whether the device can work normally when subjected to voltage sag interference. It is usually described by a voltage tolerance curve on a voltage amplitude-duration plane. The curve is clear in describing the state of the device under the action of voltage sag, that is, it is in a normal state or a fault state. There is uncertainty (fuzzy area) in the operating state under voltage sag, and the voltage tolerance curve is generally rectangular.

[0040] S102, randomly generating multiple groups of sag characteristic indicators of the voltage tolerance curve of the equipment.

[0041] In this embodiment, a plurality of groups of temporary sag characteristic indicators can be randomly generated by setting a numerical range of the temporary sag characteristic indicator and then randomly generating a plurality of groups within the range.

[0042] S103, using a particle swarm algorithm to randomly select multiple groups of temporary sag characteristic indicators, and input the selection results of the multiple groups of temporary sag characteristic indicators and the voltage sag amplitude and phase of the low-voltage release at the current moment into a function mapping relationship, until the maximum duration of no action reaches a maximum value and the minimum duration of action reaches a minimum value, and output the operating condition parameters of the low-voltage circuit breaker when the release is actuated; wherein the function mapping relationship is used to describe the correlation between the voltage sag characteristics of the release and the historical operating condition parameters.

[0043] In this embodiment, the particle swarm algorithm is an optimization algorithm based on swarm intelligence. The algorithm imitates the behavior of bird flocks foraging and finds the optimal solution to the problem through information sharing and collaboration between individuals in the group. In the particle swarm algorithm, each solution is regarded as a particle in the search space, and all particles have a fitness value, which is given by the optimization function and indicates the quality of the solution. Each particle also has a speed, which determines the direction and distance of movement of the particle in the search space.

[0044] The voltage sag characteristic of the low-voltage release refers to the three different areas of the low-voltage release under the action of voltage sag, namely: action area, non-action area and fuzzy area. The action area indicates that the number of actions of the low-voltage release is equal to the frequency of the test signal, that is, the action is certain to occur; the non-action area indicates that the number of actions of the low-voltage release is zero, that is, no action will occur; the fuzzy area indicates that the number of actions of the low-voltage release is between zero and the frequency of the test signal, that is, the action situation is uncertain.

[0045] The sag characteristic indicators of the equipment voltage tolerance curve include the voltage sag amplitude and duration.

[0046] The historical operating parameters include load capacity, voltage sag mode, voltage sag amplitude, phase, sag duration and sag interval.

[0047] Specifically, the process of determining the function mapping relationship is as follows: obtaining the historical operating parameters of the power grid where the low-voltage circuit breaker is located when a voltage sag occurs; using a bidirectional long short-term memory neural network to construct a function mapping relationship between the voltage sag characteristics of the low-voltage circuit breaker's release and the historical operating parameters.

[0048] Among them, the bidirectional long short-term memory neural network is composed of a forward long short-term memory neural network and a backward long short-term memory neural network. t-1 、x t 、x t+1 Respectively represent the input signal of the previous moment, current moment, and next moment; h t-1 、h t 、h t+1 Respectively represent the coded hidden state vectors of the previous moment, the current moment, and the next moment; the forward LSTM is a forward long short-term memory neural network, and the backward LSTM is a backward long short-term memory neural network, which consists of a forget gate, an input gate, and an output gate. The bidirectional long short-term memory neural network can encode information from backward to forward, and the two LSTMs can be trained simultaneously by inputting the forward sequence backward into the backward sequence.

[0049] By conducting batch tests on the release and obtaining a large number of sample parameters, the bidirectional long short-term memory neural network architecture can be used to determine the functional mapping relationship between the voltage sag characteristics of the release and the historical operating parameters.

[0050] S104, when it is detected that the current operating condition of the release reaches the operating condition parameter, the amplitude and phase of the grid voltage and the equipment load voltage are detected, and when the difference between the amplitude and the phase meets the preset action condition, the release is controlled to act.

[0051] Specifically, the instantaneous reactive power algorithm is used to detect the amplitude and phase of the grid voltage and the equipment load voltage. The core of the instantaneous reactive power algorithm is based on the concept of instantaneous power, which is the product of the instantaneous values ​​of voltage and current.

[0052] In a three-phase circuit, the instantaneous reactive power can be calculated by the following formula:

[0053] Where p(t) is the instantaneous active power, q(t) is the instantaneous reactive power, U is the voltage rms, I is the current rms, ω is the angular frequency, and φ is the phase difference between voltage and current.

[0054] When the difference between the amplitude and phase meets the preset action conditions, the release is controlled to act, specifically: the amplitude difference and phase angle difference between the grid voltage and the equipment load voltage are calculated. If the amplitude difference is less than the preset amplitude, it is determined whether the phase angle difference is less than the preset phase angle value. If it is less than the preset phase angle value, the release is controlled to act.

[0055] From the above-described embodiments, it can be seen that in a control method for preventing power sway of a low-voltage circuit breaker provided in the present embodiment, by introducing multiple groups of sag characteristic indicators of the equipment voltage tolerance curve of the load equipment, a solution method capable of adapting to changes in the equipment tolerance characteristics is constructed, that is, a particle swarm algorithm is used to randomly select multiple groups of randomly generated sag characteristic indicators to obtain selection results of multiple groups of control parameters, and the random selection results and the voltage sag amplitude and phase of the low-voltage release at the current moment are input into the function mapping relationship. When the obtained maximum duration of non-action reaches the maximum value and the obtained minimum duration of action reaches the minimum value, the low-voltage circuit breaker can be output. The working condition parameters of the tripper of the device when it is in action, based on the working condition parameters, can ensure that the low-voltage tripper can always maintain good voltage tolerance performance when the tolerance characteristics of the equipment change, and improve the breaking capacity of the low-voltage tripper, that is, the working condition parameters of the tripper of the low-voltage circuit breaker when it is in action are determined by the temporary sag characteristics of the load equipment, such as capacity, amplitude, duration, etc., so that when these working condition parameters are detected in the operating conditions of the power grid, it means that the power grid has a bad operation. At this time, the amplitude and phase of the power grid voltage and the equipment load voltage are detected again, and when the difference between the amplitude and phase meets the preset action conditions, the tripper is controlled to act. Therefore, the present invention is based on the voltage sag tolerance capacity of the load equipment, and takes into account the voltage sag characteristics of the low-voltage tripper. When a voltage sag event occurs, within the voltage sag tolerance range of the load equipment, the low-voltage tripper can effectively avoid false tripping, thereby ensuring the reliability of power supply on the user side. 。

[0056] Please refer to Figure 2 , Figure 2 A principle block diagram of a low voltage circuit breaker anti-power sway control device provided in an embodiment of the present application, such as Figure 2 As shown, the device comprises:

[0057] An acquisition module 210 is used to acquire a device voltage tolerance curve of a load device connected to a low voltage circuit breaker;

[0058] An index generation module 220, used to randomly generate multiple groups of sag characteristic indexes of a device voltage tolerance curve;

[0059] The operating condition parameter determination module 230 is used to randomly select multiple groups of sag characteristic indicators using a particle swarm algorithm, input the selection results of the multiple groups of sag characteristic indicators and the voltage sag amplitude and phase of the low-voltage release at the current moment into a function mapping relationship, until the maximum duration of no action reaches a maximum value and the minimum duration of action reaches a minimum value, and output the operating condition parameters of the low-voltage circuit breaker when the release is actuated; wherein the function mapping relationship is used to describe the correlation between the voltage sag characteristics of the release and the historical operating condition parameters;

[0060] The action control module 240 is used to detect the amplitude and phase of the grid voltage and the equipment load voltage when it is detected that the current operating condition of the release reaches the operating condition parameter, and control the release to operate when the difference between the amplitude and phase meets the preset action condition.

[0061] It can be seen that in a low-voltage circuit breaker anti-power shaking control device provided in this embodiment, by introducing multiple groups of temporary sag characteristic indicators of the equipment voltage tolerance curve of the load equipment, a solution method that can adapt to changes in the equipment tolerance characteristics is constructed, that is, a particle swarm algorithm is used to randomly select multiple groups of randomly generated temporary sag characteristic indicators to obtain selection results of multiple groups of control parameters, and the random selection results and the voltage temporary sag amplitude and phase of the low-voltage release at the current moment are input into the function mapping relationship. When the maximum duration of no action reaches the maximum value and the minimum duration of action reaches the minimum value, the tripping of the low-voltage circuit breaker can be output. The working condition parameters when the device is actuated can ensure that the low-voltage release can always maintain good voltage tolerance performance when the tolerance characteristics of the equipment change, and improve the breaking capacity of the low-voltage release, that is, the working condition parameters of the low-voltage circuit breaker when the release is actuated are determined by the temporary sag characteristics of the load equipment, such as capacity, amplitude, duration, etc., so that when these working condition parameters are detected in the operating conditions of the power grid, it indicates that the power grid has a bad operation. At this time, the amplitude and phase of the power grid voltage and the equipment load voltage are detected again, and when the difference between the amplitude and phase meets the preset action conditions, the release is controlled to act. Therefore, the present invention is based on the voltage sag tolerance capacity of the load equipment, and takes into account the voltage sag characteristics of the low-voltage release. When a voltage sag event occurs, within the voltage sag tolerance capacity of the load equipment, the low-voltage release can effectively avoid false tripping, thereby ensuring the reliability of power supply on the user side.

[0062] In some embodiments, the historical operating condition parameters include load capacity, voltage sag mode, voltage sag amplitude, phase, sag duration, and sag interval.

[0063] In some embodiments, the operating condition parameter determination module 230 is specifically used to:

[0064] Obtain historical operating parameters when a voltage sag occurs in the power grid where the low-voltage circuit breaker is located;

[0065] A bidirectional long short-term memory neural network is used to construct the functional mapping relationship between the voltage sag characteristics of the release of the low voltage circuit breaker and the historical operating parameters.

[0066] In some embodiments, the action control module 240 is further specifically used to: use an instantaneous reactive power algorithm to detect the amplitude and phase of the grid voltage and the equipment load voltage.

[0067] In some embodiments, the action control module 240 is further specifically used to: calculate the amplitude difference and phase angle difference between the grid voltage and the equipment load voltage; if the amplitude difference is less than the preset amplitude, determine whether the phase angle difference is less than the preset phase angle value; if it is less than the preset phase angle value, control the release to operate.

[0068] A low voltage circuit breaker anti-power sway control device in an embodiment of the present application is similar to the above Figure 1 The control method for preventing electric sway of a low-voltage circuit breaker shown is a technical solution based on the same inventive concept. Through the detailed description of the control method for preventing electric sway of a low-voltage circuit breaker provided in the above embodiment, technical personnel in this field can clearly understand the implementation process of each module of the control device for preventing electric sway of a low-voltage circuit breaker in this embodiment. Therefore, for the sake of conciseness of the specification, it will not be repeated here.

[0069] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A control method for preventing power swing of a low voltage circuit breaker, characterized in that the method include: Obtaining equipment voltage withstand curve of load equipment connected to the low voltage circuit breaker; Randomly generate multiple sets of sag characteristic indicators of equipment voltage tolerance curve; A particle swarm algorithm is used to randomly select multiple groups of sag characteristic indicators, and the selection results of the multiple groups of sag characteristic indicators and the voltage sag amplitude and phase of the low-voltage release at the current moment are input into the function mapping relationship until the maximum duration of no action reaches the maximum value and the minimum duration of action reaches the minimum value, and the operating condition parameters of the release of the low-voltage circuit breaker when the release is in action are output; wherein the function mapping relationship is used to describe the correlation between the voltage sag characteristics of the release and the historical operating condition parameters; When it is detected that the current operating conditions of the releaser reach the operating parameters, the amplitude and phase of the grid voltage and the equipment load voltage are detected. When the difference between the amplitude and phase meets the preset action conditions, the releaser is controlled to act.

2. A control method for preventing power swing of a low voltage circuit breaker according to claim 1, characterized in that: The historical operating condition parameters include load capacity, voltage sag mode, voltage sag amplitude, phase, sag duration and sag interval.

3. A control method for preventing power swing of a low voltage circuit breaker according to claim 1, characterized in that: The process of determining the function mapping relationship is as follows: Obtain historical operating parameters when a voltage sag occurs in the power grid where the low-voltage circuit breaker is located; A bidirectional long short-term memory neural network is used to construct the functional mapping relationship between the voltage sag characteristics of the release of the low voltage circuit breaker and the historical operating parameters.

4. A control method for preventing power swing of a low voltage circuit breaker according to claim 1, characterized in that: The instantaneous reactive power algorithm is used to detect the amplitude and phase of the grid voltage and the equipment load voltage.

5. A control method for preventing power swing of a low voltage circuit breaker according to claim 1, characterized in that: When the difference between the amplitude and phase meets the preset action conditions, the release is controlled to act, specifically: The amplitude difference and phase angle difference between the grid voltage and the equipment load voltage are calculated. If the amplitude difference is less than the preset amplitude, it is determined whether the phase angle difference is less than the preset phase angle value. If it is less than the preset phase angle value, the release is controlled to operate.

6. A control device for preventing power swing of low voltage circuit breaker, characterized in that: The device includes: An acquisition module, used for acquiring a device voltage tolerance curve of a load device connected to a low voltage circuit breaker; An index generation module, used to randomly generate multiple groups of sag characteristic indexes of the equipment voltage tolerance curve; A working condition parameter determination module is used to randomly select multiple groups of sag characteristic indicators using a particle swarm algorithm, input the selection results of the multiple groups of sag characteristic indicators and the voltage sag amplitude and phase of the low-voltage release at the current moment into a function mapping relationship, until the maximum duration of no action reaches a maximum value and the minimum duration of action reaches a minimum value, and output the working condition parameters of the low-voltage circuit breaker when the release is actuated; wherein the function mapping relationship is used to describe the correlation between the voltage sag characteristics of the release and the historical working condition parameters; The action control module is used to detect the amplitude and phase of the grid voltage and the equipment load voltage when it is detected that the current operating conditions of the release meet the operating parameters, and control the release to act when the difference between the amplitude and phase meets the preset action conditions.

7. A low voltage circuit breaker anti-power swing control device according to claim 6, characterized in that: The historical operating condition parameters include load capacity, voltage sag mode, voltage sag amplitude, phase, sag duration and sag interval.

8. A low voltage circuit breaker anti-power swing control device according to claim 6, characterized in that: The working condition parameter determination module is specifically used for: Obtain historical operating parameters when a voltage sag occurs in the power grid where the low-voltage circuit breaker is located; A bidirectional long short-term memory neural network is used to construct the functional mapping relationship between the voltage sag characteristics of the release of the low voltage circuit breaker and the historical operating parameters.

9. A low voltage circuit breaker anti-power sway control device according to claim 6, characterized in that: The action control module is also specifically used to: use an instantaneous reactive power algorithm to detect the amplitude and phase of the grid voltage and the equipment load voltage.

10. A low voltage circuit breaker anti-power swing control device according to claim 6, characterized in that: The action control module is also specifically used to: calculate the amplitude difference and phase angle difference between the grid voltage and the equipment load voltage; if the amplitude difference is less than the preset amplitude, determine whether the phase angle difference is less than the preset phase angle value; if it is less than the preset phase angle value, control the release to act.

Images